/Engine/Source/Runtime/Slate/Public/Widgets/Text/SlateEditableTextLayout.h
Sets the current editable text for this text block Note: Doesn't update the value of BoundText, nor does it call OnTextChanged
true if the text was updated, false if the text wasn't update (because it was already up-to-date)
bool SetEditableText ( const [FText](API\Runtime\Core\Internationalization\FText) & TextToSet, const bool bForce )